Furnace



N0. 6|D,778. Patented'Sept. 13, I898; V

R. L. WALKER.

FURNACE.

(Applicatibn filad Aug. 6, 1897.)

(No Model.)

WITNESSES THE NDRRlS PETERS co. wowu'ruov, WASHINGTON n c.

llnrrnn Status ROBERT LOUDON \VALKER, OF ALLEGHENY, PENNSYLVANIA.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 610,778, dated September 13, 1898.

Application filed August 6,1897. Serial No. 647,299. (No model.)

To all whom it may concern:

Be it known that I, ROBERT LOUDON WALK- ER, of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Smokeless Furnaces,0f which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a partial longitudinal section of a puddling-furnace constructed in accordance with my invention, and Fig. 2 is a crosssection on the line II II of Fig. 1.

My invention relates to furnaces such as are employed for heating, puddling iron, for steam-boiler, &c., and is designed to provide a furnace in which the amount of fuel consumed shall be greatly reduced and an intense even heat afforded.

In the drawings, 2 represents a puddlingchamber of a puddling-furnace, and 3 the fire-chamber or furnace proper, having gratebars 4. for the reception of solid fuel.

5 is the bridge-wall, and 6 6 the side walls, of the furnace-chamber. 7 is the roofproper of this chamber, and above this roof is provided a second roof or cover 8, which is preferably removable and is formed of archshaped segments bound together by metal strips 9. The bridge-wall is made hollow, as shown, and connects by a flue 10, leading through one of the side walls, with the chamber or space in the double roof of the furnace-top. This chamber 11 above the roof proper forms a heating-chamber for the air which enters the hollow bridgewall and passes thereinto, and this heated air is fed to the products of combustion by a port 12 at the front end of chamber 11. It will be noticed that the inner roof portion is at ahigher level than the roof 13 of the puddling-chamher, so that a downwardly-extending offset or shoulder 16 is formed, against which the products of combustion will impinge on their way to the puddling or heating chamber, and meeting the heated air at this point will become thoroughly mixed therewith. In order to further insure this action and throw the products of combustion upwardly toward the upper portion of the throat above the bridgewall, I preferably provide a lip 14, which projects from the upper end of the bridge-wall into the fire-chamber and causes the gases to pass upwardly through the upper part of the throat, where theywill impinge upon the offset and become mixed with the heated air.

15 is the usual door for the charging of the furnace.

The advantages of my invention will be apparent to those skilled in the art, since in actual practice puddling and other furnaces provided with my invention have been found to greatly decrease the amount of fuel necessary, thus cheapening the product of the furnace.

Many changes in the form and arrangement of the flues and chambers may be provided without departing from my invention, since What I claim is- 1. A heating-furnace having a fire-chamber provided with a closed top, grate-bars in the chamber, a suitable side opening for charging fuel upon the bars, an air-heating chamber covering the major portion of the roof of the fire-chamber, a port leading from the airchamber into the throat of the furnace, and

a depending offset extending in front of and.

to a point lower than the mouth of the port and arranged to deflect the flame and fuelgases and commingle them with the heated air.

2. A heating-furnace having a fire-chamber provided with a closed top, and having grate bars and a suitable opening for charging fuel upon the bars, an air-heating chamber covering a major portion of the roof of theflrechamber, a hollow bridge-wall having an airinlet, a flue in the side wall of the furnace connecting the hollow bridge-wall with the air-heating chamber, a port leading from the air-chamber into the throat of the furnace, and a depending offset extending in front of and to a point lower than the mouth of the port and arranged to deflect the flame and gases and commingle them with the heated end a deflecting-lip which projects into the air. fire-chamber. IO

3. Aheating-furnaoehaving an air-heating In testimony whereof I have hereunto set chamber in the roof of its fire-chamber, a port my hand.

leading therefrom into the throat of the fur- ROBERT LOUDON WALKER. nace, a depending offset extending in front Vitnesses: of and to a point lower than the mouth of the F. E. GAITHER,

port, and a bridge-Wall having at its upper H. M. OORWIN. 

